Mitchell Family from pittsburgh/Ireland/England

I am looking for Family of James Mitchell and Mary Morriss my understanding they had 4 children 3 girls and 1 boy John Mitchell was my grandfather he married Margaret Connors they had 8 children one who was my father William Mitchell John was born in 1896 and James was born in or abt 1862 they lived in pittsburgh pa believed south side area just have not been able to go past the james Mitchell anyone that could help i would truly love it Thankyou